Summary

This work replaces deprecated SASS map-merge and map-has-key. It avoids issues when SASS updates and gets rid of 23 warnings (469 [develop] → 446 [this branch]).

Breaking change

This is not a breaking change.

Related issue

Part of #6216.

Solution

Uses new map functions based on SASS map guidance.

Major changes

Updated map methods and imported sass:map with @use "sass:map"; where it was missing.

Testing and review

• There shouldn't be any errors on compile
• Map warnings should be gone on compile
• There shouldn't be any visual regressions in: Accordion, Banner, Combo box, Date picker (and range), Footer, Icon list, Navigation, Add Aspect, and Layout (at-media).